CN201383796Y - A base structure of a quartz resonator - Google Patents

Abstract

The utility model relates to a base structure of quartz resonator, which comprises a base plate, wherein the front side and the back side of the base plate are respectively provided with an internal electrode and an external electrode, and the front side, the back side and the side walls of the base plate are further provided with conductive grooves, a conductive circuit for communicating the internal electrode and the external electrode is printed in the conductive grooves, a groove for sticking quartz wafers is arranged in the middle of the front side of the base plate, the internal electrode is arranged on one inner end of the groove, and a supporting portion is arranged on the other inner end of the groove, and the height of the supporting portion is the same as that of the internal electrode. As the groove for sticking the quartz wafers is directly arranged on the base plate, the whole thickness of products is reduced, the base structure is simplified, and the multi-layer stacking is avoided for preventing air leakage during encapsulation and foaming phenomenon, otherwise, as the supporting portion is further arranged in the groove, and has the same height as the internal electrode, the phenomenon of unequal height can be avoided when the quartz wafers are installed in the groove, thereby guaranteeing the stability of the quartz wafers.

Description

A base structure of a quartz resonator

technical field

The utility model relates to a quartz resonator, in particular to a base on which the quartz resonator can be mounted.

Background technique

With the development of miniaturized portable electronic products, the size of components is required to be smaller and smaller so that they can be installed in the electronic products, so that the overall volume of the electronic products is reduced. As a frequency component, quartz products gradually evolve towards thinner and smaller. In 1998, they began to develop towards small SMDs. Today, they have developed from SMD-8045, 7050, 6035, 5032, 4025, and 3225 to 2520 products. Therefore, to accommodate this miniaturization, the smaller 2016 type quartz resonator was developed.

At present, the main manufacturer of 2016 surface mount quartz crystal resonators is EPSON Corporation of Japan, which has advanced technology and stable product performance. At present, there is no report that domestic manufacturers mass-produce 2016 surface mount quartz crystal resonators. As one of the most important components, the 2016 base is particularly important in its design and manufacture.

The existing base has been improved many times. At present, the SMD type is mainly a ceramic crystal resonator. Compared with the past, the AuSn material Kovar (Kovar) is used to replace the iron-cobalt-nickel alloy upper cover plate for packaging. Due to The piezoelectric crystal element has a certain thickness, so in order to meet the needs of this cover plate, an upper frame plate and a middle frame plate of a certain thickness are set between the AuSn cover plate and the substrate, and the upper frame plate, the middle frame plate and the substrate pass through The disadvantages of lamination, deglue, and sintering are that because it is multi-layer, the processing technology is complicated, and it is easy to cause uneven thickness after multi-layer stacking, and it is easy to cause air leakage and foaming after packaging. Therefore, for the process, Temperature, equipment, etc. have very high requirements, and the product qualification rate is low.

Contents of the invention

The utility model aims at the above-mentioned deficiencies, and provides a base structure of a quartz resonator that can effectively avoid air leakage during packaging, reduce product thickness, and has a simple structure and convenient processing.

In order to solve the above technical problems, the utility model is solved through the following technical solutions:

A pedestal structure of a quartz resonator, including a substrate, internal electrodes and external electrodes are respectively provided on the front and back of the substrate, conductive grooves are also opened on the front, back and side walls of the substrate, and the conductive grooves The inside is printed with a conductive line connecting the inner electrode and the outer electrode, and a groove for mounting a quartz wafer is provided in the middle of the front of the substrate, the inner electrode is arranged at one end of the groove, and a supporting part is arranged at the other end of the groove. The height of the supporting portion is the same as that of the internal electrodes.

Preferably, the conductive grooves on the front and back are opened at the corners of the substrate, and the conductive grooves on the side walls are opened on the side wall edges of the substrate.

Preferably, the internal electrode includes two spaced positive and negative electrodes, and the positive and negative electrodes can be respectively connected to the two electrodes of the quartz resonator.

The technical effect of the utility model adopting the above-mentioned technical scheme is: since the groove for mounting the quartz wafer is directly opened on the substrate, the overall thickness of the product is reduced, the base structure is simplified, and the product is miniaturized; at the same time Avoiding multi-layer stacking, preventing air leakage and blistering during packaging; in addition, there is a support part in the groove, and the height of the support part is the same as the height of the internal electrode, so that the quartz wafer can be installed When in the groove, there will be no uneven phenomenon, thus ensuring its stability.

Instructions attached

Fig. 1 is the structural representation of the utility model base;

Fig. 2 is a rear view of Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Embodiment: as shown in Figure 1 and Figure 2, a base structure of a quartz resonator includes a substrate 1, the substrate 1 is made of ceramics, and the front and back sides of the substrate 1 are respectively provided with an inner electrode 2 and an outer electrode. The electrodes 9 are also provided with conductive grooves 4 on the front, back and side walls of the substrate 1, and conductive lines 7b and 7d connecting the inner electrodes 2 and the outer electrodes 9 are printed in the conductive grooves 4. The conductive grooves 4 on the front and back of the substrate 1 are provided at the corners of the substrate 1 , and the conductive grooves 4 on the side walls are provided on the side wall edges of the substrate 1 .

A groove 5 for mounting a quartz wafer is provided in the middle of the front of the substrate 1, and the internal electrode 2 is arranged at one end in the groove 5. The internal electrode 2 includes two positive electrodes A and negative electrodes B arranged at intervals. When mounting quartz wafer in groove 5, positive electrode A, negative electrode B can connect two electrodes of quartz wafer respectively, and the other end in groove 5 is provided with supporting portion 6, and the height of supporting portion 6 is the same as positive electrode A, positive electrode A, negative electrode B. The heights of the negative electrodes B are all the same, so that the quartz wafer can be mounted on a stable platform, and the stability is greatly improved.

Due to the piezoelectric effect principle of quartz crystal, only two electrodes are needed, so the base of the utility model is designed with two necessary external electrodes. In order to make the appearance beautiful and consistent with the existing base, a 4 external electrodes 9a, 9b, 9c, 9d are provided, as shown in Fig. 2, wherein 9a, 9c are dummy electrodes, and the conductive lines 7a and 7c on the corresponding side edges are not connected to the internal electrodes 2. In this application circuit, the AuSn upper cover can be grounded through the outer electrode 9b for shielding; the other two electrodes 9b, 9d are respectively connected to the inner electrode 2 through the conductive lines 7b and 7d on the corresponding side edges.

In addition, the * part in the attached figure plays the role of connecting the substrates when the base is plated with gold.

Claims (3)

1. the base construction of a quartz resonator, include substrate, electrode and external electrode on the front and back of substrate, being respectively equipped with, on front, the back side and the sidewall of substrate, also offer conductive trough, and in conductive trough, be printed be communicated with in the conducting wire of electrode and external electrode, be provided with a groove that mounts quartz wafer in the centre of substrate front side, interior electrode is arranged on the interior end of groove, the other end in groove is provided with the support portion, and the height of support portion is identical with the height of interior electrode.

2. the base construction of a kind of quartz resonator according to claim 1, it is characterized in that: the conductive trough of front and back is opened in the edge of substrate, and the conductive trough on the sidewall is opened on the sidewall rib of substrate.

3. the base construction of a kind of quartz resonator according to claim 1 is characterized in that: electrode comprises two positive and negative electrodes that are provided with at interval in described, and positive and negative electrode can connect two electrodes of quartz resonator respectively.

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